Using my **Chromebook**, after a minute or so of running, I got this error while placing a point:
QXcbConnection: XCB error: 3 (BadWindow), sequence: 7061, resource id: 2097220, major code: 40 (TranslateCoords), minor code: 0
However, it did not crash, the point successfully placed, & It kept running! As I did more point placements, (experimenting with making a grid to see how that works with copying patterns pictured on a grid, so lots of simple point placements.) I continued to get variants of the same error as I went along, the variation of which can be seen below:
QXcbConnection: XCB error: 3 (BadWindow), sequence: 15682, resource id: 2097226, major code: 40 (TranslateCoords), minor code: 0
I realize that it is a somewhat non-standard implementation of Linux, & so far it has been more stable than any of my previous installs. So I’m basically mentioning this for the purpose of complete documentation. (Though I’d be happy to help figure it out if someone wants to direct me.)